Valve mechanism



Feb. 1`z L 1924; 1,483,390

. B. `s. sNow 'VALVE MEGHANISM Filed Oct. 11 1920 2 Sheets-Sheet. l

''iiiiijinlll ilg n n g y Feb. 12 1924.- 1,483,390

B. S. SNOW f VALVE MECHANISM Filed Oct. I1 1920 2 Sheets-Sheet 2Patented Feb. 12, 1924.

T T S PATET OFFICE.

BARTON S. SNOW, OF BATAVIA., ILLINOIS, ASSIGNORKTO T. W/SNOWCONSTRUCTION CO., OF CHICAGO, ILLINOIS, .A CORPORATION OF ILLINOIS.

VALVE MECHANISM.

Application led October 11, 1920. Serial No. 416,165.

To all whom t may concern Be it known that I, BARTON S. SNOW, a citizenot the United States, residing at Batavia, in the county of Kane andState oi' Illinois, have invented a new and useful improvement in ValveMechanism, of which the YFollowing is a specification.

My invention relates more particularly to valve mechanism for use inwater-cranes to control the flow of water therethrough; and my primaryobjects are to provide a novel, simple and positively operatingconstruction ot valve mechanism which shall require the exertion or'relatively slight force by the operator to open the valve. Furtherobjects are to provide a structure wherein the minimum resistance tothelow of water through the stand-pipe by obstruct-ion from the valvemechanism, is presented, and to provide an automticallyv closing valvewhich will operate in such a manner as to avoid waterhammer, and insureproper closure lof the valve.

Referring to the accompanying drawings:

Figure 1 is a view in side elevation or' the lower, valve-equipped,portion of a watercrane or stand-pipe equipped with valve mechanism inaccordance with my invention. Figure 2 is a view in longitudinalsectional elevation of the construction shown in Fig. 17 showingthelvalve mechanism in closed condition. Figure 3 is a view like Fig. 2 or'the mechanism therein shown, showing the valve mechanism in opencondition. Figure 4 is a section taken at the irregular line 4-4 on Fig.3 and viewed in the direction of the arrows; and Figure 5, a perspectiveview of one of the links forming a portion of the valve mechanism.

In the particular construction illustrated the pipe which leads: intothe bottom of the stand-pipe and which would be connected with anysuitable source of water-supply, is represented at 6, and the verticalportion of the stand-pipe at 7, there being interposed between theadjacent ends of these two pipes, tocommunicate therewith, a valvehousing 8. i y The pipe section 7 is shown as rotatably supported on anextension 9 of the housing 8, the support being through the medium ofaseries of ball bearings 10 andthe joint between these parts beingpacked as represented at 11. The valve housing 8 is provided at itsupper end with a ported portion 12 which extends into the bodyv of thevalve housing and connnunicateswith the pipe T, and at its lower endwith a ported portion 13 communicating with the pipe 6, the innery endor' the ported portion 12 which `lorms aV seat represented at 14co-operating with a lap valve 16 which, as is usual in the case offlap-valves is loosely pivoted, as indicated at 18, to a boss 2O on themember 12. The inner end of the ported portion 13 co-operates with aflap-valve 17 loosely pivoted, as indicated at 19, on the member 13. Thevalves 16 and l? are provided with ears 22 and 23, respectively`apertured, as indicated, in which the ends of links 24 and 25,respectively, are pivoted, the other ends of these links being pivotedto the opposite ends, as indicated at 26 and 27, respectively, of alever' 28 located within the housing 8 and fixed on the shaft 29journaled in the housing,` the outer end of the shaft 29 having an arm30 connected with an uprightly extending operating rod 31 which would beoperated in any desirable manner and through the medium of which thelever 23 and the valves controlled thereby are operated to open thepipes 6 and 7 to the housing 8. The pivot connection between the link 24and valve 16 involves the slotting of vthe ear 22 as represented at 22and in which the pivot pin 22 on the link24 extends and is shiftablelengthwise of the slot for a purpose hereinafter stated.

The flap-valve 16 contains a port 32 controlled by a valve 33 whichopens upward` lyV against the action of a spring 34 shown as encirclinga rod 35 rigidly secured to the valve 33 and forming a stem therefor andconined between the valve 33 and the base of a yoke member 36 secured tothe upper side of the valve 16 and through which the stem 34 extends andis slidable, the valve thus provided being of the check type, with `thespring so tensioned that it will resist the pressure of the water in thehousing 3 exerted against the valve 33 and therefore hold the latterclosed', except when operated as hereinafter described. The lower end otthe stemA 35 extends into the path of move ment of a boss 37 (formed onthe link 24),

lin the rotation of the shaft 2 9 in clockwise direction in Fig. 2.

The operation olf the valve mechanism 1s as follows Assuming the valvemechanism to be in the normal position represented in Figs. l and 2,wherein the valve housing 8 would be filled with Water supplied from thepipe 6', and existing therein under substantially the same pressure, andthe pivot pin 22" extends into the lowerend ot the slot 22a, the valvemechanism is moved to open condition by the operator drawing up on therod 31. In view of the sliding connection between the rod 24 and thevalvei as stated, a slight movement of the rod 3l, before the parts aremoved sulficiently tar to start to open the valve 16, causes the rod tosvving upwardly, by reason or the inclined slot 22"L and in suchmovement forces ythe check valve vu'pwardly, thereby affording a ventfrom the housing S to the pipe 7 which immediately causesthe pressure todrop in .housing 8". The pressure thus partially relieved in housing 8,the incoming Water from the pipe 6- exerts a force on the valve l in adirection to continue the turning of shaflt 29 and the opening of thevalve 16, thereby aiding the operator in the actuation of the mechanismto a position in Which both valves are fully open (Fig,

ln the' arrangement shown it is required that the operator hold the rod3l in raised position, to maintain the fiap-valves 16 and 17 in the opencondition represented in Fig. 3, and therefore, upon releasing upwardpressure on the rod 3l, these valves, under the Weight of thevalve-operating parts the weight of which isi augmented in the structureillustratedy by a Weight represented at a on the end of the lever 30,are caused to move to a position in Which the valve 16 becomes tightlyseated against the seat 'let by reason of the waterlv pressure againstits under side, the valve 33 assuming closed polsition in. thus seatingvalve 16.

It will therefore be understood from the foregoing that the valvemechanism may be moved to open condition with comparative case and bythe exertion of a very small 'r mount of force on the part of theoperator,

and that the movement of the valve mec-hanism to closed position isautomatically lected by the operator discontinuing upward pressure onthe rod 3l.

The structure is shovvn as provided With means for venting` the pipe 7of the Water contained therein after the valve 16 closes, this meanscomprising an innardly-opening check-valve 36VX controlling a vent port37 which opens into the interior of the pipe 7 as shown in Fig. 2, thevalve 36X having a stem 38 which extends into the path ot' downwardmovement of a rod 39 connected with the valve-operating rod 3l throughthe medium of an arm- 40; these parts being so positioned when themain-valie-operating parts of the structure are in the normal positionshovvn in Figs. l and 2, the valve 36X will be open, but willautomatically close upon the lifting of' the rod 3l to open the mainvalves.

llt Will be noted that by the arrangement shown the closing oi the valveis cushioned by the Water as the valve il' operates against the flow ofWater from pipe (l, thereby avoiding vwater-hammer.

The valve 83 also serves as a relief valve in case of the existence ofexcessive pressure in housing 8.

`While l have illustrated and described a particular constructionembodying my invention, l do not Wish to be understood as intending tolimit it thereto as the same may be variously modified and alteredWithout departing lrom the spirit ol my invention.

VVilhat l claim as new and desire to secure by Let-ters Patent is:

l. A valve mechanism comprising a housing having an inlet port and. anoutlet port, valves cooperating with said ports, the one ot said valvesco--operating with said inlet port opening in the direction oi' fion'or' the fluid through said housing and the other ot said valves closingin the direction or floiv olf the fluid, saidvalves being connectedtogether for movement in opposite directions: and means for reducing thepressure ot fluid in the housing against the one of said valvescontrolling said outlet port, in the closed position of the latter.

2. A valve mechanism comprising a housing having an inlet port and anoutlet port, flap-valves co-operating with said ports, the one of saidvalves co-operating with said inlet port opening in the direction offlouv of the fluid through said housing and the ot ier of said valvesclosing in the direction ot iioiv of the fluid, said valves beingconnected together for movement in opposite directions, and means 'forreducing the pressure of fluid in the housing against the one of saidvalves controlling said outlet portf in the closed posit-ion of thelatter.

3v A valve mechanism con'iprising a housing having an inlet port and anoutlet porn valves cooperating` With said ports, the one ot said valvescooperating with said inlet portopening in the direction oit flony otthe fiuid thru said housing and the other of said valves closing in thedirection of lloiv oi the fluid, said valves being connected togetherfor movement in opposite directions a third port opening into saidhousing. and a valve cont-rolling said port and closing against the flowof fluid from said housing and operable to open position for reducing'the pressure of fluid in the housing in the closed position of the valvecontrolling said outlet, said last-named valve being operableautomatically to relieve the pressure in said housing when the pressuretherein exceeds a predetermined degree.

4. A valve mechanism comprising a housing having an inlet port and anoutlet port, valves co-operating with said ports, the one of said valvesco-operating With saidinlet port opening in the direction of flow of thefluid through said housing and the other of said valves closing in thedirection of flow of the fluid, said valves being connected together formovement in opposite directions, and means for reducing the pressure offluid in the housing against the one of said valves controlling saidoutlet port, in the closed position of the latter, and thereafteropening said valves.

5. A valve mechanism comprising a housing having an inlet port and anoutlet port,

y valves co-o-perating With said ports` the one of said valvesco-operatin'g with said inlet port opening in the direction of flow ofthe fluid through said housing and the other of said valves closing inthe direction of flow of the fluid, a port in said last-referred-tovalve, a valve controlling said last-referredto port, and means foroperating said valves.

6. A valve mechanism comprising a housing having an inlet port a-nd anoutlet port, flap-valves co-operating with said ports, the one of saidvalves co-operating With said inlet port opening in the direction offlow of the fiuid through said housing and thel other of said valvesclosing in the direction of flow of the fluid, a port in saidlast-referred-to valve, a valve controlling said last-referred-to port,and means for operating said valves.

7. A valve mechanism comprising` a hous ing having an inlet port and anoutlet port, valves co-operating With said ports, the one of said valvesco-operating With said inlet port opening in the direction of flow ofthe fluid through said housing and the other of said valves closing inthe direction of flow of the fluid, a port in said last-referred-tovalve, an automatically closing valve controllingsaid last-referred-toport, and means for operating said valves.

S. A valve mechanism comprising a housing having an inlet port and anoutlet port, valves co-operatin'g with said ports, the one of saidvalves co-operating with said inletJ port opening` in the direction offioW of the fiuid through said housing and the other of' said valvesclosing in the direction of flow of the fluid, a port in saidlast-referredto valve, a valve controlling said last-referred-to port,and means for opening` said last-referred-to valve to reduce thepressure of the fluid against the one of said valves controlling saidoutlet port, and thereafter moving said first-referred-to valves to opencondition.

9. A valve mechanism comprising a housing having an inlet port and anoutlet port, valves (3o-operating With said ports, the one of saidvalves (zo-operating with said inlet port opening in the direction offionv of the iuid through said housing and the other of said valvesclosing in the direction of flow of the fiuid. port in saidlast-referred-to valve, a valve controlling` said last-referredto port,said first-named valves being connected together for movement inopposite directions, and means operating to open the valve whichcontrols the port in the one of said valves which controls saidoutletport.

10. A valve mechanism comprising a housing having an inlet port and anoutlet port, a valve co-operating with said outlet port and closing inthe direction of the flow of fiuid through said housing, means 'forreducing the pressure of fluid in the housing against said valve whenthe latter is in closed position, and means extending into the fion" offiuid through said housing and operated 'thereby for exerting force onsaid valve tending to open the latter.

ll. A valve mechanism comprising a housing having an inlet port and anoutlet port, a valve co-operating with said outlet port to close in thedirection of the flow of fluid through said housing, a port in saidvalve, a valve controlling said last-referred-to port, and` meansextending into the flow of fluid throu h said housing operating to opensaid secont -referred-to'valve and operated by the floW of Water throughsaid housing to exert a force on said first-referred-to valve in adirection tending to open the latter.

l2. A valve mechanism.comprising a housing having an inlet port and anoutlet port, a valve co-operating with said outlet port and closing inthe direction of the flow of fluid through said housing, said valvecontaining a port, a second valve controlling said port, and1neans,"eXtending into the flow of fluid through said housing operablemanually, for first opening said second valve and operated by the floWof fluid through said housing for thereafter opening said first-namedvalve.

13. A valve mechanism comprising a housing having an inlet port and anoutlet port, a valve co-operating With said outlet port and closing inthe direction of the flow of fluid through said housing, said,a valvecontaining a port, a second valve controlling said port, avalve-operating shiftable member engaging said first-named -valve andoperating when shifted to first open said second valve and thereafteropen said firstnamed valve, and a member engaging said shiftable memberand extending into the fionY of fluid through said housing and operatingunder the action of the incoming fluid to tend to open said first-namedvalve and resist by the action of the fluid thereagainst it the closingof said first-named valve.

14. A valve mechanism comprising a housing having an inlet port and anoutlet port, valves cooperating With said ports, the one of said valvescooperating with said inlet port opening in the direction of flow ol theiiuid through said housing and the other` ot said valves closing in thedirection ot flow of the lliuid, said valves being connected togetherfor movement in opposite directions, a third port opening into saidhousing, and a valve controlling said third port operable `l'or reducingthe pressure of iuid in the housing in the closed position oi' the oneof said valves controlling said outlet port.

l5. A valve mechanism comprising a housing having an inlet port and anoutlet port, valves cooperating with said ports, the one of said valvescooperating with said inlet port opening in the direction. oi i'ioiv or"the fluid thru said housing and the other of said valves closing in thedirection oi flow of the fluid, said valves being connected together formovement in opposite directions, a third port opening into said housing,and a spring-tensioned valve controlling said third port operable forreducing the pressure fluid in the housing in the closed position of theone of said valves controlling said outlet port, and automaticallymovable to closed position.

16. A valve mechanism comprising a housing having an inlet port and anoutlet port, valves cooperating With said ports, the one of said valvescooperating with said inlet port opening in the direction of flow of theiiuid thru said housing and the other of said valves closing in thedirection of liow of the fluid, a port in said last-referred-to valve,and a valve controlling said last-relierred-to port.

17. A valve mechanism comprisingV a housing having an inlet port and anoutlet port, valves cooperating With said ports, the one of said valvescooperating with said inlet port opening in the direction of llow ol theiluid through said housing and the other ol' said valves closing in thedirection ol: flow ot the lluid, a third port opening into said housing,and an auton'iatically closing valve controlling said last-reerred-toport.

18. A valve mechanism comprising a housing having an inlet port and anoutlet port, a valve cooperating Vwith said outlet port, to close in thedirection of the l'low ot' fluid thru said housing, a third port openinginto said housing, a valve controlling said lastreiferred-to port, andmeans extending into the lovv of iiuid thru said housing operablemanually to open said second-reterred-to valve and operable by the flowof fluid through said housing to exert a force on saidlirst-re'l'erred-to valve in a direction tending to open the latter.

19. A valve mechanism comprising a housing having an inlet port and anoutlet port, a Hap-valve cooperating With said outlet port and closingin the direction of the flow of iuid thru said housing, said valvecontaining a port, a second Hap-valve cooperating with said inlet andopening in the direction of iovv of fluid thru said inlet, a third valvecontrolling the port in said outlet valve, a spring normally holdingsaid valve in closed position, a rock-shaft, and mechanism connectedWith said rock-shaft and connecting the latter and said inlet and outletvalves, whereby When said rock-shaft is rocked in one direction saidinlet and outlet valves move in opposite directions, and operating inthe initial movement of said rockshaft to open said third valve beforesaid outlet valve is moved out of closed position.

BARTON S. SNOW.

